Master Models' Z-25 German Destroyer Set (For Trumpeter) Armament set consists of four different calibers of brass barrel; there are four of the 15cm/48 main guns, two for forward twin turret, and one each for the singles aft. Next, there eight 37mm/83 barrels for the twin AA mounts of the older type, and four 37mm/69 of the newer single type. Lastly, there are 18 of the 20mm/65 C38 barrels, used both singly and in quad Flakvierling 35's.